Patents by Inventor Meng-Jaw Cherng

Meng-Jaw Cherng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5491104
    Abstract: An improved method for fabricating dynamic random access memory (DRAM) cell having a fin-shaped capacitor with increased capacitance was achieved. The capacitor is fabricated over the bit lines and makes contact to the source/drain area of a field effect transistor (FET). The capacitor with increased capacitance is formed by depositing an N doped polysilicon layer making electrical contact to the source/drain of the FET. A sacrificial oxide layer is deposited and a contact opening formed over the DRAM cell area to the polysilicon layer. A second polysilicon layer is deposited and patterned over the sacrificial oxide layer forming the top fin portion of the capacitor, which makes electrical contact to the first polysilicon layer through the contact opening. The sacrificial oxide layer is then completely removed by wet etching, while the underlying polysilicon layer provides a very important etch stop to protect the substrate structures.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: February 13, 1996
    Assignee: Industrial Technology Research Institute
    Inventors: William W. Y. Lee, Meng-Jaw Cherng, Ing-Ruey Liaw